Clam AntiVirus (ClamAV) 0.88 and earlier allows remote attackers to cause a denial of service (crash) via a malformed base64-encoded MIME attachment that triggers a null pointer dereference.

A "stack overwrite" vulnerability in GnuPG (gpg) 1.x before 1.4.6, 2.x before 2.0.2, and 1.9.0 through 1.9.95 allows attackers to execute arbitrary code via crafted OpenPGP packets that cause GnuPG to dereference a function pointer from deallocated stack memory.

The Core::Receive function in neonet/core.cpp for NeoEngine 0.8.2 and earlier, and CVS 3422, allow remote attackers to cause a denial of service (engine crash) via a message with a large uiMessageLength that produces a failed memory allocation and a null pointer dereference.

Linux kernel 2.6.x up to 2.6.18 and possibly other versions, when SELinux hooks are enabled, allows local users to cause a denial of service (crash) via a malformed file stream that triggers a NULL pointer dereference in the superblock_doinit function, as demonstrated using an HFS filesystem image.

The Linux kernel 2.6.x up to 2.6.18, and possibly other versions, on Fedora Core 6 and possibly other operating systems, allows local users to cause a denial of service (crash) via a malformed gfs2 file stream that triggers a NULL pointer dereference in the init_journal function.

Novell iManager 2.5 and 2.0.2 allows remote attackers to cause a denial of service (crash) in the Tomcat server via a long TREE parameter in an HTTP POST, which triggers a NULL pointer dereference.

Firefox 1.5.0.7 and 2.0, and Seamonkey 1.1b, allows remote attackers to cause a denial of service (crash) by creating a range object using createRange, calling selectNode on a DocType node (DOCUMENT_TYPE_NODE), then calling createContextualFragment on the range, which triggers a null dereference. NOTE: the original Bugtraq post mentioned that code execution was possible, but followup analysis has shown that it is only a null dereference.

Microsoft Windows NAT Helper Components (ipnathlp.dll) on Windows XP SP2, when Internet Connection Sharing is enabled, allows remote attackers to cause a denial of service (svchost.exe crash) via a malformed DNS query, which results in a null pointer dereference.

Unspecified vulnerability in the WBXML dissector in Wireshark (formerly Ethereal) 0.10.11 through 0.99.3 allows remote attackers to cause a denial of service (crash) via certain vectors that trigger a null dereference.

Unspecified vulnerability in Yahoo! Messenger (Service 18) before 8.1.0.195 allows remote attackers to cause a denial of service (NULL dereference and application crash) via a crafted room name in a Conference Invite. NOTE: the provenance of this information is unknown; the details are obtained from third party information.

PowerPoint in Microsoft Office 2003 does not properly handle a container object whose position value exceeds the record length, which allows user-assisted attackers to cause a denial of service (NULL dereference and application crash) via a crafted PowerPoint (.PPT) file, as demonstrated by Nanika.ppt, and a different vulnerability than CVE-2006-3435, CVE-2006-3876, CVE-2006-3877, and CVE-2006-4694. NOTE: the impact of this issue was originally claimed to be arbitrary code execution, but later analysis demonstrated that this was erroneous.

The clip_mkip function in net/atm/clip.c of the ATM subsystem in Linux kernel allows remote attackers to cause a denial of service (panic) via unknown vectors that cause the ATM subsystem to access the memory of socket buffers after they are freed (freed pointer dereference).

Messenger Agents (nmma.exe) in Novell GroupWise 2.0.2 and 1.0.6 allows remote attackers to cause a denial of service (crash) via a crafted HTTP POST request to TCP port 8300 with a modified val parameter, which triggers a null dereference related to "zero-size strings in blowfish routines."

The nlmclnt_mark_reclaim in clntlock.c in NFS lockd in Linux kernel before 2.6.16 allows remote attackers to cause a denial of service (process crash) and deny access to NFS exports via unspecified vectors that trigger a kernel oops (null dereference) and a deadlock.

Format string vulnerability in the NSRunAlertPanel function in eBay Skype for Mac 1.5.*.79 and earlier allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a malformed Skype URL, as originally reported to involve a null dereference.

The get_server_hello function in the SSLv2 client code in OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows remote servers to cause a denial of service (client crash) via unknown vectors that trigger a null pointer dereference.

Unspecified vulnerability in gzip 1.3.5 allows context-dependent attackers to cause a denial of service (crash) via a crafted GZIP (gz) archive, which results in a NULL dereference.

IBM DB2 Universal Database (UDB) before 8.1 FixPak 13 allows remote authenticated users to cause a denial of service (crash) by (1) sending the first ACCSEC command without an RDBNAM parameter during the CONNECT process, or (2) sending crafted SQLJRA packet, which results in a null dereference.

The dc_chat function in cmd.dc.c in DConnect Daemon 0.7.0 and earlier allows remote attackers to cause a denial of service (application crash) by sending a client message before providing the nickname, which triggers a null pointer dereference.

The server driver (srv.sys) in Microsoft Windows NT 4.0, 2000, XP, and Server 2003 allows remote attackers to cause a denial of service (system crash) via an SMB_COM_TRANSACTION SMB message that contains a string without null character termination, which leads to a NULL dereference in the ExecuteTransaction function, possibly related to an "SMB PIPE," aka the "Mailslot DOS" vulnerability. NOTE: the name "Mailslot DOS" was derived from incomplete initial research; the vulnerability is not associated with a mailslot.